package com.itheima.ydd.config;

import com.itheima.ydd.commom.JacksonObjectMapper;
import com.itheima.ydd.interceptor.TokenInterceptor;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport;

import java.util.List;

@Configuration
@Slf4j
public class MvcConfig extends WebMvcConfigurationSupport {
    @Autowired
    private TokenInterceptor tokenInterceptor;

    // 添加拦截器
    @Override
    protected void addInterceptors(InterceptorRegistry registry) {
        registry.addInterceptor(tokenInterceptor)
                .addPathPatterns("/**")  //需要拦截的路径(/**拦截所有路径)
                .excludePathPatterns("/index/**",
                        "/home/**",
                        "/common/upload",
                        "/error"
                ); //需要放行的静态资源和登录资源
    }

    /**
     * 静态资源映射
     * @param registry
     */
    @Override
    protected void addResourceHandlers(ResourceHandlerRegistry registry) {
        registry.addResourceHandler("/static/**").addResourceLocations("classpath:/");
    }

    /**
     * 扩展mvc消息转换器
     * @param converters
     */
    @Override
    public void extendMessageConverters(List<HttpMessageConverter<?>> converters) {
        log.info("扩展消息转换器");
        //创建消息转换器对象
        MappingJackson2HttpMessageConverter messageConverter = new MappingJackson2HttpMessageConverter();
        //设置对象转换器,底层使用Jackson将Java对象转为json
        messageConverter.setObjectMapper(new JacksonObjectMapper());
        //将上面的消息转换器对象追加到mvc框架的转换器集合中
        converters.add(0,messageConverter);
    }
}
